Ignition Transformer - Navien NCB-150E Service Manual

4.9.6 Ignition Transformer

Part
Function
Failure Event
Effects
Error Code
Diagnostic
Color/Number of wires
Input Voltage Output Voltage
120 V, 60 Hz 20 KV±
To ignite gas by repeatedly discharging a high voltage spark to the main burner until gas ignites.
1. Unable to ignite during the ignition process.
2. Produces multiple unsuccessful attempts to ignite.
1. The unit cannot ignite during the ignition process and "E003" or "E004" error codes will display.
2. Durability of the igniter wears down.
E003, E004
1. Visual inspection: Check wire connections are secure.
2. Voltage check: Check range of voltage shown below.
Blue
On : AC 97 - 138 V
●
Off : 0 V
●
Output Current
10mA±2mA
Check Point
System Details 69